Computer generated icon for a display screen



FIG. 1 is a front, top and right side perspective view of a computer generated icon for a display screen showing our new design, the broken line drawing of a display screen is for illustrative purposes only and forms no part of the claimed design; and,

FIG. 2 is a front view, the icon is shown separately for clarity of illustration, on an enlarged scale. 

The ornamental design for a computer generated icon for a display screen, as shown and described. 